Marion Zimmer Bradley died of heart failure Saturday in Berkeley, CA. The noted writer of fantasy and science fiction, including the sprawling Darkover series of novels, was 69.

Bradley lost consciousness following a heart attack on Tuesday, September 21, and was hospitalized immediately thereafter at Alta Bates Hospital in Berkeley, where she succumbed four days later.

A lifetime fan of SF, she made her first semi-professional sale to Fantastic/Amazing Stories in 1949, exactly a half-century before her demise. Since then, she wrote or edited nearly 100 volumes of fantasy, SF and mainstream fiction.

In particular, her 36-volume Darkover series endures as one of the most monolithic works of science fiction literature, bridging the span between the early "nuts and bolts" concerns of the Golden Age generation and the social, issues-oriented work of the New Wave and feminist writers to follow.

Darkover is the epic story of gender politics, telepathy and the inexorable evolution of society on a planet settled by Earth colonists some time in the distant future. Even at its most gothic, the series remains rooted in the basic formal and theoretical foundation of planetary SF, and can rightly take its place in that genre.

Bradley is survived by a brother, three children and two grandchildren, as well as the long-running periodical, Marion Zimmer Bradley's Fantasy Magazine, which she edited from its inception in 1988. The generation of writers she inspired and encouraged may also justifiably count among her survivors.